@inproceedings{fdi:010025638, title = {{T}otal mercury distribution in the {B}olivian tributaries of the {M}adeira river : importance of the biomagnification process in the aquatic food-chain}, author = {{M}aurice {B}ourgoin, {L}aurence and {Q}uiroga, {I}. and {M}alm, {O}. and {C}ourau, {P}.}, editor = {}, language = {{ENG}}, abstract = {{T}otal mercury concentration range measured in surface waters of the {B}olivian {A}mazon basin vary from 2.24-2.57 ng 1-1 in glacial waters to 7.228.22 ng 1-1, in the {B}eni {R}iver at the end of the {A}ndean piedmont. {T}he highest mercury concentration were not found in the rivers where the mining activities take place but at the outlet of the {A}ndean sub-basins exploited for their alluvial gold. {T}he quite low concentrations of {H}g in the sediments indicate a low sedimentary contamination due to the high particulate transport in the {A}ndena tributaries. {I}n piscivorous fishes, the mercury concentrations found vary in the {B}eni and {M}amore rivers from 0.8-2.3 ug {H}g g-1 and 0.4-2-1 ug {H}g g-1 respectively, to 0.3-5.2 ug {H}g g-1 in the {M}adeira {R}iver at its formatin. {W}e found that 70% of the piscivorous fishes collected was highty contaminated. {T}he major health impact caused by mercury affects people who are not working directly in gold cooperatives but who have a regular fish diet. ({R}{\'e}sum{\'e} d'auteur)}, keywords = {{MERCURE} ; {CONTAMINATION} ; {POLLUTION} {DES} {EAUX} {CONTINENTALES} ; {COURS} {D}'{EAU} ; {POISSON} {D}'{EAU} {DOUCE} ; {EXPLOITATION} {DU} {SOUS} {SOL} ; {OR} ; {ALIMENTATION} {HUMAINE} ; {SANTE} {PUBLIQUE} ; {BOLIVIE} ; {MADEIRA} {FLEUVE}}, numero = {}, pages = {7 multigr.}, booktitle = {{M}anaus'99 : hydrological and geochemical processes in large scale river}, year = {1999}, URL = {https://www.documentation.ird.fr/hor/fdi:010025638}, }